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A solenoid gas valve having a solenoid assembly and inlet and outlet fittings is installed inside a tube. The opening and closing of the valve is operated by the pressure difference with an aid of the magnetic field. A compression spring is attached to the support cylindrical body and held against t

A solenoid gas valve having a solenoid assembly and inlet and outlet fittings is installed inside a tube. The opening and closing of the valve is operated by the pressure difference with an aid of the magnetic field. A compression spring is attached to the support cylindrical body and held against the inlet end fitting while a moving solenoid assembly is located inside the support cylindrical body. The moving solenoid assembly that consists of a stop, a flange, a sleeve and an electrical coil, is held by a second compression spring that is attached to the inside of the support cylindrical body. A small moving magnetic rod, slides inside the sleeve of the solenoid assembly. Acted by a third compression spring, the magnetic rod seals the gas outlet through the bleed orifice on the flange of the solenoid assembly.

대표청구항 ▼

We claim: 1. An in-tube solenoid gas valve, comprising: a valve tube defining a gas inlet passage, a gas outlet passage and a cavity; an inlet fitting with an axial hole threading into said inlet passage of said valve tube to connect to the in-line tube of piping system; an outlet fitting provides

We claim: 1. An in-tube solenoid gas valve, comprising: a valve tube defining a gas inlet passage, a gas outlet passage and a cavity; an inlet fitting with an axial hole threading into said inlet passage of said valve tube to connect to the in-line tube of piping system; an outlet fitting provides a seal seat and an axial hole threading into said outlet passage of said valve tube to connect to the inline tube of piping system; a support cylindrical body with a chamber is pushed by a compression spring, against said inlet fitting, inserting into said outlet fitting; a solenoid assembly comprising a flange, an electrical coil, a stop, and a sleeve, able to slide in said chamber of said support cylindrical body; said solenoid assembly comprising an O-ring located in said flange for segregating said chamber to a front side chamber and a back side chamber; said flange provides a small seal seat, a bleed orifice, and an axial hole; a plastic insert with a center hole, is molded onto said flange, to provide seal. 2. The in-tube solenoid gas valve as defined in claim 1; a minuscule hole on said support cylindrical body acts a restricting gas conduit, limiting the amount of gas of cavity flow into said front side chamber of said support cylindrical body. 3. The in-tube solenoid gas valve as defined in claim 1; having a gas conduit for passing the gas from said front side chamber of said support cylindrical body to a hollow space of said solenoid assembly, via an eccentric axial small hole on said stop. 4. The in-tube solenoid gas valve as defined in claim 1; having a gas conduit for passing the gas from said hollow space of said solenoid assembly, via said axial hole of said flange; said minuscule hole having a diameter smaller than that of both said eccentric axial small hole and said bleed orifice of said flange of said solenoid assembly. 5. An in-tube solenoid gas valve as defined in claim 1; holes, on said support cylindrical body peripherally, locating at the side of inserting into said outlet fitting, provide gas conduits for passing the gas in said cavity flow into said back side chamber. 6. An in-tube solenoid gas valve as defined in claim 1; said solenoid assembly being spring biased by a compression spring onto said seal seat of said outlet fitting, to a closed position. 7. An in-tube solenoid gas valve as defined in claim 1; a magnetic rod, able to slide inside said sleeve in said hollow space of said solenoid assembly, is biased by a compression spring and pushed onto said small seal seat of said flange to a closed position; a rubber insert with an axial hole, is molded onto said magnetic rod, to provide seal. 8. An in-tube solenoid gas valve as defined in claim 1; said electrical coil associated with said stop, said sleeve, said flange of said solenoid assembly and said support cylindrical body, provides a magnetic field for movements of said magnetic rod and said flange incorporating within said solenoid assembly, so that when the electrical current in said electrical coil is diminished, said magnetic rod closes said bleed orifice of said flange and causes a pressure equalization, allowing said compression spring to push said solenoid assembly to close the valve and when said electrical coil means is energized, said magnetic rod opens said bleed orifice to release the gas in said hollow space of said solenoid assembly and lowers the pressure in said front side chamber which causes pushing of said solenoid assembly to open the valve. 9. An in-tube solenoid gas valve as defined in claim 1; extend lead wires of said electrical coil pass through the hole of an internal pass-through plug which is inserted into said support cylindrical body, to said cavity of said valve tube. 10. An in-tube solenoid gas valve as defined in claim 1; said extend lead wires of said electrical coil as defined in claim 9, is soldered on terminals of an external pass-through connector at one end; external wires which is from a power supply, through a threaded metal plug with a center hole, is soldered on terminals of said external pass-through connector at the other end; electrical current pass through said external wires from said power supply, said external pass-through connector, to said lead wires of said electrical coil, to provide a said magnetic field for movements of said magnetic rod and said solenoid assembly. 11. An in-tube solenoid gas valve, defined in claim 1; said external pass-through connector comprising an o-ring for sealing internal pressure gas in said cavity of said valve tube; said thread metal plug thread into said inlet fitting, to hold said external pass-through connector in said inlet fitting.